The Request class in deterministic_dispatcher.h was made moveable to support
its inclusion in a circular_deque. There was some minor cleanup of this
class.

Typedefs around changed code were converted to using statements.

Some unnecessary <deque> includes were removed. An unnecessary <list>
include is removed from remoting/protocol/message_decoder.h, and a
<list> include was addedto remoting/protocol/message_decoder_unittest.cc
which was depending on this.

TBR=stevenjb (chromeos/network owners)

Bug: 757232
Cq-Include-Trybots: master.tryserver.blink:linux_trusty_blink_rel;master.tryserver.chromium.android:android_optional_gpu_tests_rel;master.tryserver.chromium.linux:linux_optional_gpu_tests_rel;master.tryserver.chromium.mac:mac_optional_gpu_tests_rel;master.tryserver.chromium.win:win_optional_gpu_tests_rel
Change-Id: I654daa3f575b21fbfd6db225d0c321bc5781f96f
Reviewed-on: https://chromium-review.googlesource.com/676201
Commit-Queue: Brett Wilson <brettw@chromi...